/* Bit values & structures for resource limits.  Linux version.
   Copyright (C) 1994-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_RESOURCE_H
#error "Never use <bits/resource.h> directly; include <sys/resource.h> instead."
#endif

#include <bits/types.h>

/* Transmute defines to enumerations.  The macro re-definitions are
   necessary because some programs want to test for operating system
   features with #ifdef RUSAGE_SELF.  In ISO C the reflexive
   definition is a no-op.  */

/* Kinds of resource limit.  */
enum __rlimit_resource {
	/* Per-process CPU limit, in seconds.  */
	RLIMIT_CPU = 0,
#define RLIMIT_CPU RLIMIT_CPU

	/* Largest file that can be created, in bytes.  */
	RLIMIT_FSIZE = 1,
#define	RLIMIT_FSIZE RLIMIT_FSIZE

	/* Maximum size of data segment, in bytes.  */
	RLIMIT_DATA = 2,
#define	RLIMIT_DATA RLIMIT_DATA

	/* Maximum size of stack segment, in bytes.  */
	RLIMIT_STACK = 3,
#define	RLIMIT_STACK RLIMIT_STACK

	/* Largest core file that can be created, in bytes.  */
	RLIMIT_CORE = 4,
#define	RLIMIT_CORE RLIMIT_CORE

	/* Largest resident set size, in bytes.
	   This affects swapping; processes that are exceeding their
	   resident set size will be more likely to have physical memory
	   taken from them.  */
	__RLIMIT_RSS = 5,
#define	RLIMIT_RSS __RLIMIT_RSS

	/* Number of open files.  */
	RLIMIT_NOFILE = 7,
	__RLIMIT_OFILE = RLIMIT_NOFILE,	/* BSD name for same.  */
#define RLIMIT_NOFILE RLIMIT_NOFILE
#define RLIMIT_OFILE __RLIMIT_OFILE

	/* Address space limit.  */
	RLIMIT_AS = 9,
#define RLIMIT_AS RLIMIT_AS

	/* Number of processes.  */
	__RLIMIT_NPROC = 6,
#define RLIMIT_NPROC __RLIMIT_NPROC

	/* Locked-in-memory address space.  */
	__RLIMIT_MEMLOCK = 8,
#define RLIMIT_MEMLOCK __RLIMIT_MEMLOCK

	/* Maximum number of file locks.  */
	__RLIMIT_LOCKS = 10,
#define RLIMIT_LOCKS __RLIMIT_LOCKS

	/* Maximum number of pending signals.  */
	__RLIMIT_SIGPENDING = 11,
#define RLIMIT_SIGPENDING __RLIMIT_SIGPENDING

	/* Maximum bytes in POSIX message queues.  */
	__RLIMIT_MSGQUEUE = 12,
#define RLIMIT_MSGQUEUE __RLIMIT_MSGQUEUE

	/* Maximum nice priority allowed to raise to.
	   Nice levels 19 .. -20 correspond to 0 .. 39
	   values of this resource limit.  */
	__RLIMIT_NICE = 13,
#define RLIMIT_NICE __RLIMIT_NICE

	/* Maximum realtime priority allowed for non-priviledged
	   processes.  */
	__RLIMIT_RTPRIO = 14,
#define RLIMIT_RTPRIO __RLIMIT_RTPRIO

	/* Maximum CPU time in µs that a process scheduled under a real-time
	   scheduling policy may consume without making a blocking system
	   call before being forcibly descheduled.  */
	__RLIMIT_RTTIME = 15,
#define RLIMIT_RTTIME __RLIMIT_RTTIME

	__RLIMIT_NLIMITS = 16,
	__RLIM_NLIMITS = __RLIMIT_NLIMITS
#define RLIMIT_NLIMITS __RLIMIT_NLIMITS
#define RLIM_NLIMITS __RLIM_NLIMITS
};

/* Value to indicate that there is no limit.  */
#ifndef __USE_FILE_OFFSET64
#define RLIM_INFINITY ((__rlim_t) -1)
#else
#define RLIM_INFINITY 0xffffffffffffffffuLL
#endif

#ifdef __USE_LARGEFILE64
#define RLIM64_INFINITY 0xffffffffffffffffuLL
#endif

/* We can represent all limits.  */
#define RLIM_SAVED_MAX	RLIM_INFINITY
#define RLIM_SAVED_CUR	RLIM_INFINITY

/* Type for resource quantity measurement.  */
#ifndef __USE_FILE_OFFSET64
typedef __rlim_t rlim_t;
#else
typedef __rlim64_t rlim_t;
#endif
#ifdef __USE_LARGEFILE64
typedef __rlim64_t rlim64_t;
#endif

struct rlimit {
	/* The current (soft) limit.  */
	rlim_t rlim_cur;
	/* The hard limit.  */
	rlim_t rlim_max;
};

#ifdef __USE_LARGEFILE64
struct rlimit64 {
	/* The current (soft) limit.  */
	rlim64_t rlim_cur;
	/* The hard limit.  */
	rlim64_t rlim_max;
};
#endif

/* Whose usage statistics do you want?  */
enum __rusage_who {
	/* The calling process.  */
	RUSAGE_SELF = 0,
#define RUSAGE_SELF RUSAGE_SELF

	/* All of its terminated child processes.  */
	RUSAGE_CHILDREN = -1
#define RUSAGE_CHILDREN RUSAGE_CHILDREN
#ifdef __USE_GNU
	    ,
	/* The calling thread.  */
	RUSAGE_THREAD = 1
#define RUSAGE_THREAD RUSAGE_THREAD
	    /* Name for the same functionality on Solaris.  */
#define RUSAGE_LWP RUSAGE_THREAD
#endif
};

#define __need_timeval
#include <bits/time.h>		/* For `struct timeval'.  */

/* Structure which says how much of each resource has been used.  */

/* The purpose of all the unions is to have the kernel-compatible layout
   while keeping the API type as 'long int', and among machines where
   __syscall_slong_t is not 'long int', this only does the right thing
   for little-endian ones, like x32.  */
struct rusage {
	/* Total amount of user time used.  */
	struct timeval ru_utime;
	/* Total amount of system time used.  */
	struct timeval ru_stime;
	/* Maximum resident set size (in kilobytes).  */
	__extension__ union {
		long int ru_maxrss;
		__syscall_slong_t __ru_maxrss_word;
	};
	/* Amount of sharing of text segment memory
	   with other processes (kilobyte-seconds).  */
	/* Maximum resident set size (in kilobytes).  */
	__extension__ union {
		long int ru_ixrss;
		__syscall_slong_t __ru_ixrss_word;
	};
	/* Amount of data segment memory used (kilobyte-seconds).  */
	__extension__ union {
		long int ru_idrss;
		__syscall_slong_t __ru_idrss_word;
	};
	/* Amount of stack memory used (kilobyte-seconds).  */
	__extension__ union {
		long int ru_isrss;
		__syscall_slong_t __ru_isrss_word;
	};
	/* Number of soft page faults (i.e. those serviced by reclaiming
	   a page from the list of pages awaiting reallocation.  */
	__extension__ union {
		long int ru_minflt;
		__syscall_slong_t __ru_minflt_word;
	};
	/* Number of hard page faults (i.e. those that required I/O).  */
	__extension__ union {
		long int ru_majflt;
		__syscall_slong_t __ru_majflt_word;
	};
	/* Number of times a process was swapped out of physical memory.  */
	__extension__ union {
		long int ru_nswap;
		__syscall_slong_t __ru_nswap_word;
	};
	/* Number of input operations via the file system.  Note: This
	   and `ru_oublock' do not include operations with the cache.  */
	__extension__ union {
		long int ru_inblock;
		__syscall_slong_t __ru_inblock_word;
	};
	/* Number of output operations via the file system.  */
	__extension__ union {
		long int ru_oublock;
		__syscall_slong_t __ru_oublock_word;
	};
	/* Number of IPC messages sent.  */
	__extension__ union {
		long int ru_msgsnd;
		__syscall_slong_t __ru_msgsnd_word;
	};
	/* Number of IPC messages received.  */
	__extension__ union {
		long int ru_msgrcv;
		__syscall_slong_t __ru_msgrcv_word;
	};
	/* Number of signals delivered.  */
	__extension__ union {
		long int ru_nsignals;
		__syscall_slong_t __ru_nsignals_word;
	};
	/* Number of voluntary context switches, i.e. because the process
	   gave up the process before it had to (usually to wait for some
	   resource to be available).  */
	__extension__ union {
		long int ru_nvcsw;
		__syscall_slong_t __ru_nvcsw_word;
	};
	/* Number of involuntary context switches, i.e. a higher priority process
	   became runnable or the current process used up its time slice.  */
	__extension__ union {
		long int ru_nivcsw;
		__syscall_slong_t __ru_nivcsw_word;
	};
};

/* Priority limits.  */
#define PRIO_MIN	-20	/* Minimum priority a process can have.  */
#define PRIO_MAX	20	/* Maximum priority a process can have.  */

/* The type of the WHICH argument to `getpriority' and `setpriority',
   indicating what flavor of entity the WHO argument specifies.  */
enum __priority_which {
	PRIO_PROCESS = 0,	/* WHO is a process ID.  */
#define PRIO_PROCESS PRIO_PROCESS
	PRIO_PGRP = 1,		/* WHO is a process group ID.  */
#define PRIO_PGRP PRIO_PGRP
	PRIO_USER = 2		/* WHO is a user ID.  */
#define PRIO_USER PRIO_USER
};

__BEGIN_DECLS
#ifdef __USE_GNU
/* Modify and return resource limits of a process atomically.  */
#ifndef __USE_FILE_OFFSET64
extern int prlimit(__pid_t __pid, enum __rlimit_resource __resource, const struct rlimit *__new_limit, struct rlimit *__old_limit) __THROW;
#else
#ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH(prlimit, (__pid_t __pid, enum __rlimit_resource __resource, const struct rlimit * __new_limit, struct rlimit * __old_limit), prlimit64);
#else
#define prlimit prlimit64
#endif
#endif
#ifdef __USE_LARGEFILE64
extern int prlimit64(__pid_t __pid, enum __rlimit_resource __resource, const struct rlimit64 *__new_limit, struct rlimit64 *__old_limit) __THROW;
#endif
#endif

__END_DECLS
